The full length Fulcrum midsole makes the Fast a cushioned shoe upon impact and directs all forces forward.

Weight:

Mens US10: 320g / 11.2oz

Heel/Toe:

22 mm / 12 mm

Karhu Feet Measurement And Table

Place a piece of paper on the floor with one end against the wall. Put your foot on the piece of paper with your heel against the wall

Take a pencil and mark the end of your longest toe on the paper. Repeat for your other foot.

Measure in cm from the wall (heel) to the longest point (toe). Take the larger measurements and compare it with our shoe sizes in the size chart.

Feet Measurement (in centimeters)

US Men Size

US Women Size

EU Size

UK Size

23

23.4

23.8

24.3

24.6

25.1

25.5

25.9

26.3

26.8

27.2

27.6

28

28.5

28.9

29.3

29.7

30.1

30.6

31

4

4.5

5

5.5

6

6.5

7

7.5

8

8.5

9

9.5

10

10.5

11

11.5

12

12.5

13

14

5.5

6

6.5

7

7.5

8

8.5

9

9.5

10

10.5

11

11.5

12

12.5

13

-

-

-

-

35

36

37

38

39

39.5

40

40.5

41.5

42

42.5

43.5

44

44.5

45

46

46.5

47

48

49

3

3.5

4

4.5

5

5.5

6

6.5

7

7.5

8

8.5

9

9.5

10

10.5

11

11.5

12

-

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The support of the full length Fulcrum units ensures a stable running shoe from heel to toe.
The Fulcrum unit is able to reduce pronation throughout the entire stance phase onto toe off.
The Fulcrum unit’s geometry ensures that the shoe never over corrects the foot into a supinated position.